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run_command.c - slstatus - status monitor |
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git clone git://git.suckless.org/slstatus |
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run_command.c (501B) |
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1 /* See LICENSE file for copyright and license details. */ |
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2 #include <stdio.h> |
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3 #include <string.h> |
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4 |
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5 #include "../slstatus.h" |
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6 #include "../util.h" |
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7 |
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8 const char * |
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9 run_command(const char *cmd) |
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10 { |
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11 char *p; |
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12 FILE *fp; |
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13 |
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14 if (!(fp = popen(cmd, "r"))) { |
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15 warn("popen '%s':", cmd); |
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16 return NULL; |
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17 } |
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18 |
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19 p = fgets(buf, sizeof(buf) - 1, fp); |
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20 if (pclose(fp) < 0) { |
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21 warn("pclose '%s':", cmd); |
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22 return NULL; |
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23 } |
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24 if (!p) |
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25 return NULL; |
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26 |
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27 if ((p = strrchr(buf, '\n'))) |
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28 p[0] = '\0'; |
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29 |
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30 return buf[0] ? buf : NULL; |
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31 } |
