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concat.c - sbase - suckless unix tools |
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concat.c (398B) |
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--- |
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1 /* See LICENSE file for copyright and license details. */ |
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2 #include <unistd.h> |
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3 |
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4 #include "../util.h" |
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5 |
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6 int |
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7 concat(int f1, const char *s1, int f2, const char *s2) |
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8 { |
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9 char buf[BUFSIZ]; |
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10 ssize_t n; |
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11 |
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12 while ((n = read(f1, buf, sizeof(buf))) > 0) { |
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13 if (writeall(f2, buf, n) < 0) { |
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14 weprintf("write %s:", s2); |
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15 return -2; |
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16 } |
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17 } |
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18 if (n < 0) { |
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19 weprintf("read %s:", s1); |
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20 return -1; |
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21 } |
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22 return 0; |
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23 } |
